0-day flaw in iOS and OS X

This is interesting, in a depressing sort of way: it’s a report on Unauthorized Cross-App Resource Access on Mac OS X and iOS documenting a combination of issues that affect both OS X and iOS. The researchers behind the report are from the universities of Indiana, Tsinghua, and Peking, and the Georgia Institute of Technology. They state that:

We reported this vulnerability to Apple on Oct. 15, 2014, and communicated with them again in November, 2014 and early 2015.

However, they say that the issues have not so far been resolved. The report is quite long and detailed, but if you want a briefer summary, there have been plenty of summarizing articles: